ALSA CVS update - Jaroslav Kysela <perex@suse.cz>

Documentation,ALSA Core,PCMCIA Kconfig,PCMCIA
Sound Core PDAudioCF driver
Added Sound Core PDAudioCF driver

Documentation/sound/alsa/ALSA-Configuration.txt

@@ -1179,6 +1179,16 @@ Module parameters
 
     The power-management is supported.
 
+  Module snd-pdaudiocf
+  --------------------
+
+    Module for Sound Core PDAudioCF soundcard.
+
+    irq_mask	  - IRQ mask (PCMCIA type)
+    irq_list	  - List of available interrupts for this soundcard
+
+    Note: the driver is build only when CONFIG_ISA is set.
+
 
 Configuring Non-ISAPNP Cards
 ============================

sound/core/Makefile

@@ -108,5 +108,6 @@ obj-$(CONFIG_SND_VXP440) += snd-pcm.o snd-timer.o snd-page-alloc.o snd.o snd-hwd
 obj-$(CONFIG_SND_VX222) += snd-pcm.o snd-timer.o snd-page-alloc.o snd.o snd-hwdep.o
 obj-$(CONFIG_SND_BT87X) += snd-pcm.o snd-timer.o snd-page-alloc.o snd.o
 obj-$(CONFIG_SND_MIXART) += snd-pcm.o snd-timer.o snd-page-alloc.o snd.o snd-hwdep.o
+obj-$(CONFIG_SND_PDAUDIOCF) += snd-pcm.o snd-timer.o snd-page-alloc.o snd.o
 
 obj-m := $(sort $(obj-m))

sound/pcmcia/Kconfig

@@ -15,4 +15,10 @@ config SND_VXP440
 	help
 	  Say 'Y' or 'M' to include support for Digigram VXpocket 440 soundcard.
 
+config SND_PDAUDIOCF
+	tristate "Sound Core PDAudioCF"
+	depends on SND && PCMCIA && ISA
+	help
+	  Say 'Y' or 'M' to include support for Sound Core PDAudioCF soundcard.
+
 endmenu

sound/pcmcia/Makefile

@@ -3,6 +3,4 @@
 # Copyright (c) 2001 by Jaroslav Kysela <perex@suse.cz>
 #
 
-obj-$(CONFIG_SND) += vx/
-
-
+obj-$(CONFIG_SND) += vx/ pdaudiocf/

sound/pcmcia/pdaudiocf/Makefile

+#
+# Makefile for ALSA
+# Copyright (c) 2004 by Jaroslav Kysela <perex@suse.cz>
+#
+
+snd-pdaudiocf-objs := pdaudiocf.o pdaudiocf_core.o pdaudiocf_irq.o pdaudiocf_pcm.o
+
+obj-$(CONFIG_SND_PDAUDIOCF) += snd-pdaudiocf.o

sound/pcmcia/pdaudiocf/pdaudiocf.c

+/*
+ * Driver for Sound Core PDAudioCF soundcard
+ *
+ * Copyright (c) 2003 by Jaroslav Kysela <perex@suse.cz>
+ *
+ *   This program is free software; you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation; either version 2 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program; if not, write to the Free Software
+ *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
+ */
+
+#include <sound/driver.h>
+#include <sound/core.h>
+#include <linux/slab.h>
+#include <pcmcia/version.h>
+#include <pcmcia/ciscode.h>
+#include <pcmcia/cisreg.h>
+#include "pdaudiocf.h"
+#define SNDRV_GET_ID
+#include <sound/initval.h>
+
+/*
+ */
+
+#define CARD_NAME	"PDAudio-CF"
+
+MODULE_AUTHOR("Jaroslav Kysela <perex@suse.cz>");
+MODULE_DESCRIPTION("Sound Core " CARD_NAME);
+MODULE_LICENSE("GPL");
+MODULE_CLASSES("{sound}");
+MODULE_DEVICES("{{Sound Core," CARD_NAME "}}");
+
+static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;	/* Index 0-MAX */
+static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;	/* ID for this card */
+static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;	/* Enable switches */
+static unsigned int irq_mask = 0xffff;
+static int irq_list[4] = { -1 };
+
+MODULE_PARM(index, "1-" __MODULE_STRING(SNDRV_CARDS) "i");
+MODULE_PARM_DESC(index, "Index value for " CARD_NAME " soundcard.");
+MODULE_PARM_SYNTAX(index, SNDRV_INDEX_DESC);
+MODULE_PARM(id, "1-" __MODULE_STRING(SNDRV_CARDS) "s");
+MODULE_PARM_DESC(id, "ID string for " CARD_NAME " soundcard.");
+MODULE_PARM_SYNTAX(id, SNDRV_ID_DESC);
+MODULE_PARM(enable, "1-" __MODULE_STRING(SNDRV_CARDS) "i");
+MODULE_PARM_DESC(enable, "Enable " CARD_NAME " soundcard.");
+MODULE_PARM_SYNTAX(enable, SNDRV_ENABLE_DESC);
+MODULE_PARM(irq_mask, "i");
+MODULE_PARM_DESC(irq_mask, "IRQ bitmask for " CARD_NAME " soundcard.");
+MODULE_PARM(irq_list, "1-4i");
+MODULE_PARM_DESC(irq_list, "List of Available interrupts for " CARD_NAME " soundcard.");
+ 
+
+/*
+ */
+
+static dev_info_t dev_info = "snd-pdaudiocf";
+static snd_card_t *card_list[SNDRV_CARDS];
+static dev_link_t *dev_list;
+
+/*
+ * prototypes
+ */
+static void pdacf_config(dev_link_t *link);
+static int pdacf_event(event_t event, int priority, event_callback_args_t *args);
+static void snd_pdacf_detach(dev_link_t *link);
+
+static void pdacf_release(dev_link_t *link)
+{
+	if (link->state & DEV_CONFIG) {
+		/* release cs resources */
+		CardServices(ReleaseConfiguration, link->handle);
+		CardServices(ReleaseIO, link->handle, &link->io);
+		CardServices(ReleaseIRQ, link->handle, &link->irq);
+		link->state &= ~DEV_CONFIG;
+	}
+}
+
+/*
+ * destructor
+ */
+static int snd_pdacf_free(pdacf_t *pdacf)
+{
+	dev_link_t *link = &pdacf->link;
+
+	pdacf_release(link);
+
+	/* Break the link with Card Services */
+	if (link->handle)
+		CardServices(DeregisterClient, link->handle);
+
+	card_list[pdacf->index] = NULL;
+	pdacf->card = NULL;
+
+	snd_magic_kfree(pdacf);
+	return 0;
+}
+
+static int snd_pdacf_dev_free(snd_device_t *device)
+{
+	pdacf_t *chip = snd_magic_cast(pdacf_t, device->device_data, return -ENXIO);
+	return snd_pdacf_free(chip);
+}
+
+/*
+ * snd_pdacf_attach - attach callback for cs
+ */
+static dev_link_t *snd_pdacf_attach(void)
+{
+	client_reg_t client_reg;	/* Register with cardmgr */
+	dev_link_t *link;		/* Info for cardmgr */
+	int i, ret;
+	pdacf_t *pdacf;
+	snd_card_t *card;
+	static snd_device_ops_t ops = {
+		.dev_free =	snd_pdacf_dev_free,
+	};
+
+	snd_printdd(KERN_DEBUG "pdacf_attach called\n");
+	/* find an empty slot from the card list */
+	for (i = 0; i < SNDRV_CARDS; i++) {
+		if (! card_list[i])
+			break;
+	}
+	if (i >= SNDRV_CARDS) {
+		snd_printk(KERN_ERR "pdacf: too many cards found\n");
+		return NULL;
+	}
+	if (! enable[i])
+		return NULL; /* disabled explicitly */
+
+	/* ok, create a card instance */
+	card = snd_card_new(index[i], id[i], THIS_MODULE, 0);
+	if (card == NULL) {
+		snd_printk(KERN_ERR "pdacf: cannot create a card instance\n");
+		return NULL;
+	}
+
+	pdacf = snd_pdacf_create(card);
+	if (! pdacf)
+		return NULL;
+
+	if (snd_device_new(card, SNDRV_DEV_LOWLEVEL, pdacf, &ops) < 0) {
+		snd_magic_kfree(pdacf);
+		snd_card_free(card);
+		return NULL;
+	}
+
+	pdacf->index = i;
+	card_list[i] = card;
+
+	link = &pdacf->link;
+	link->priv = pdacf;
+
+	link->io.Attributes1 = IO_DATA_PATH_WIDTH_AUTO;
+	link->io.NumPorts1 = 16;
+
+	link->irq.Attributes = IRQ_TYPE_EXCLUSIVE | IRQ_HANDLE_PRESENT | IRQ_FORCED_PULSE;
+	// link->irq.Attributes = IRQ_TYPE_DYNAMIC_SHARING|IRQ_FIRST_SHARED;
+
+	link->irq.IRQInfo1 = IRQ_INFO2_VALID /* | IRQ_LEVEL_ID */;
+	if (irq_list[0] == -1)
+		link->irq.IRQInfo2 = irq_mask;
+	else
+		for (i = 0; i < 4; i++)
+			link->irq.IRQInfo2 |= 1 << irq_list[i];
+	link->irq.Handler = pdacf_interrupt;
+	link->irq.Instance = pdacf;
+	link->conf.Attributes = CONF_ENABLE_IRQ;
+	link->conf.IntType = INT_MEMORY_AND_IO;
+	link->conf.ConfigIndex = 1;
+	link->conf.Present = PRESENT_OPTION;
+
+	/* Chain drivers */
+	link->next = dev_list;
+	dev_list = link;
+
+	/* Register with Card Services */
+	client_reg.dev_info = &dev_info;
+	client_reg.Attributes = INFO_IO_CLIENT | INFO_CARD_SHARE;
+	client_reg.EventMask = 
+		CS_EVENT_CARD_INSERTION | CS_EVENT_CARD_REMOVAL
+#ifdef CONFIG_PM
+		| CS_EVENT_RESET_PHYSICAL | CS_EVENT_CARD_RESET
+		| CS_EVENT_PM_SUSPEND | CS_EVENT_PM_RESUME
+#endif
+		;
+	client_reg.event_handler = &pdacf_event;
+	client_reg.Version = 0x0210;
+	client_reg.event_callback_args.client_data = link;
+
+	ret = CardServices(RegisterClient, &link->handle, &client_reg);
+	if (ret != CS_SUCCESS) {
+		cs_error(link->handle, RegisterClient, ret);
+		snd_pdacf_detach(link);
+		return NULL;
+	}
+
+	return link;
+}
+
+
+/**
+ * snd_pdacf_assign_resources - initialize the hardware and card instance.
+ * @port: i/o port for the card
+ * @irq: irq number for the card
+ *
+ * this function assigns the specified port and irq, boot the card,
+ * create pcm and control instances, and initialize the rest hardware.
+ *
+ * returns 0 if successful, or a negative error code.
+ */
+static int snd_pdacf_assign_resources(pdacf_t *pdacf, int port, int irq)
+{
+	int err;
+	snd_card_t *card = pdacf->card;
+
+	snd_printdd(KERN_DEBUG "pdacf assign resources: port = 0x%x, irq = %d\n", port, irq);
+	pdacf->port = port;
+	pdacf->irq = irq;
+	pdacf->chip_status |= PDAUDIOCF_STAT_IS_CONFIGURED;
+
+	err = snd_pdacf_ak4117_create(pdacf);
+	if (err < 0)
+		return err;	
+
+	err = snd_pdacf_pcm_new(pdacf);
+	if (err < 0)
+		return err;
+
+	strcpy(card->driver, "PDAudio-CF");
+	sprintf(card->shortname, "Core Sound %s", card->driver);
+	sprintf(card->longname, "%s at 0x%x, irq %i",
+		card->shortname, port, irq);
+
+#ifdef CONFIG_PM
+	card->power_state_private_data = pdacf;
+	card->set_power_state = snd_pdacf_set_power_state;
+#endif
+
+	if ((err = snd_card_register(card)) < 0)
+		return err;
+
+	return 0;
+}
+
+
+/*
+ * snd_pdacf_detach - detach callback for cs
+ */
+static void snd_pdacf_detach(dev_link_t *link)
+{
+	pdacf_t *chip = snd_magic_cast(pdacf_t, link->priv, return);
+
+	snd_printdd(KERN_DEBUG "pdacf_detach called\n");
+	/* Remove the interface data from the linked list */
+	{
+		dev_link_t **linkp;
+		/* Locate device structure */
+		for (linkp = &dev_list; *linkp; linkp = &(*linkp)->next)
+			if (*linkp == link)
+				break;
+		if (*linkp)
+			*linkp = link->next;
+	}
+	if (chip->chip_status & PDAUDIOCF_STAT_IS_CONFIGURED)
+		snd_pdacf_powerdown(chip);
+	chip->chip_status |= PDAUDIOCF_STAT_IS_STALE; /* to be sure */
+	snd_card_disconnect(chip->card);
+	snd_card_free_in_thread(chip->card);
+}
+
+/*
+ * snd_pdacf_detach_all - detach all instances linked to the hw
+ */
+static void snd_pdacf_detach_all(void)
+{
+	while (dev_list != NULL)
+		snd_pdacf_detach(dev_list);
+}
+
+/*
+ * configuration callback
+ */
+
+#define CS_CHECK(fn, args...) \
+while ((last_ret=CardServices(last_fn=(fn), args))!=0) goto cs_failed
+
+static void pdacf_config(dev_link_t *link)
+{
+	client_handle_t handle = link->handle;
+	pdacf_t *pdacf = snd_magic_cast(pdacf_t, link->priv, return);
+	tuple_t tuple;
+	cisparse_t parse;
+	config_info_t conf;
+	u_short buf[32];
+	int last_fn, last_ret;
+
+	snd_printdd(KERN_DEBUG "pdacf_config called\n");
+	tuple.DesiredTuple = CISTPL_CFTABLE_ENTRY;
+	tuple.Attributes = 0;
+	tuple.TupleData = (cisdata_t *)buf;
+	tuple.TupleDataMax = sizeof(buf);
+	tuple.TupleOffset = 0;
+	tuple.DesiredTuple = CISTPL_CONFIG;
+	CS_CHECK(GetFirstTuple, handle, &tuple);
+	CS_CHECK(GetTupleData, handle, &tuple);
+	CS_CHECK(ParseTuple, handle, &tuple, &parse);
+	link->conf.ConfigBase = parse.config.base;
+	link->conf.ConfigIndex = 0x5;
+
+	CS_CHECK(GetConfigurationInfo, handle, &conf);
+	link->conf.Vcc = conf.Vcc;
+
+	/* Configure card */
+	link->state |= DEV_CONFIG;
+
+	CS_CHECK(RequestIO, handle, &link->io);
+	CS_CHECK(RequestIRQ, link->handle, &link->irq);
+	CS_CHECK(RequestConfiguration, link->handle, &link->conf);
+
+	if (snd_pdacf_assign_resources(pdacf, link->io.BasePort1, link->irq.AssignedIRQ) < 0)
+		goto failed;
+
+	link->dev = &pdacf->node;
+	link->state &= ~DEV_CONFIG_PENDING;
+	return;
+
+cs_failed:
+	cs_error(link->handle, last_fn, last_ret);
+failed:
+	CardServices(ReleaseConfiguration, link->handle);
+	CardServices(ReleaseIO, link->handle, &link->io);
+	CardServices(ReleaseIRQ, link->handle, &link->irq);
+}
+
+/*
+ * event callback
+ */
+static int pdacf_event(event_t event, int priority, event_callback_args_t *args)
+{
+	dev_link_t *link = args->client_data;
+	pdacf_t *chip = link->priv;
+
+	switch (event) {
+	case CS_EVENT_CARD_REMOVAL:
+		snd_printdd(KERN_DEBUG "CARD_REMOVAL..\n");
+		link->state &= ~DEV_PRESENT;
+		if (link->state & DEV_CONFIG) {
+			chip->chip_status |= PDAUDIOCF_STAT_IS_STALE;
+		}
+		break;
+	case CS_EVENT_CARD_INSERTION:
+		snd_printdd(KERN_DEBUG "CARD_INSERTION..\n");
+		link->state |= DEV_PRESENT;
+		pdacf_config(link);
+		break;
+#ifdef CONFIG_PM
+	case CS_EVENT_PM_SUSPEND:
+		snd_printdd(KERN_DEBUG "SUSPEND\n");
+		link->state |= DEV_SUSPEND;
+		if (chip) {
+			snd_printdd(KERN_DEBUG "snd_pdacf_suspend calling\n");
+			snd_pdacf_suspend(chip);
+		}
+		/* Fall through... */
+	case CS_EVENT_RESET_PHYSICAL:
+		snd_printdd(KERN_DEBUG "RESET_PHYSICAL\n");
+		if (link->state & DEV_CONFIG)
+			CardServices(ReleaseConfiguration, link->handle);
+		break;
+	case CS_EVENT_PM_RESUME:
+		snd_printdd(KERN_DEBUG "RESUME\n");
+		link->state &= ~DEV_SUSPEND;
+		/* Fall through... */
+	case CS_EVENT_CARD_RESET:
+		snd_printdd(KERN_DEBUG "CARD_RESET\n");
+		if (DEV_OK(link)) {
+			snd_printdd(KERN_DEBUG "requestconfig...\n");
+			CardServices(RequestConfiguration, link->handle, &link->conf);
+			if (chip) {
+				snd_printdd(KERN_DEBUG "calling snd_pdacf_resume\n");
+				snd_pdacf_resume(chip);
+			}
+		}
+		snd_printdd(KERN_DEBUG "resume done!\n");
+		break;
+#endif
+	}
+	return 0;
+}
+
+/*
+ * Module entry points
+ */
+static struct pcmcia_driver pdacf_cs_driver = {
+	.owner          = THIS_MODULE,
+	.drv            = {
+		.name   = "snd-pdaudiocf",
+	},
+	.attach         = snd_pdacf_attach,
+	.detach         = snd_pdacf_detach
+};
+
+static int __init init_pdacf(void)
+{
+	return pcmcia_register_driver(&pdacf_cs_driver);
+}
+
+static void __exit exit_pdacf(void)
+{
+	pcmcia_unregister_driver(&pdacf_cs_driver);
+	snd_pdacf_detach_all();
+}
+
+module_init(init_pdacf);
+module_exit(exit_pdacf);

sound/pcmcia/pdaudiocf/pdaudiocf.h

+/*
+ * Driver for Sound Cors PDAudioCF soundcard
+ *
+ * Copyright (c) 2003 by Jaroslav Kysela <perex@suse.cz>
+ *
+ *   This program is free software; you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation; either version 2 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program; if not, write to the Free Software
+ *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
+ */
+
+#ifndef __PDAUDIOCF_H
+#define __PDAUDIOCF_H
+
+#include <sound/pcm.h>
+#include <pcmcia/cs_types.h>
+#include <pcmcia/cs.h>
+#include <pcmcia/cistpl.h>
+#include <pcmcia/ds.h>
+
+#include "ak4117.h"
+
+/* PDAUDIOCF registers */
+#define PDAUDIOCF_REG_MD	0x00	/* music data, R/O */
+#define PDAUDIOCF_REG_WDP	0x02	/* write data pointer / 2, R/O */
+#define PDAUDIOCF_REG_RDP	0x04	/* read data pointer / 2, R/O */
+#define PDAUDIOCF_REG_TCR	0x06	/* test control register W/O */
+#define PDAUDIOCF_REG_SCR	0x08	/* status and control, R/W (see bit description) */
+#define PDAUDIOCF_REG_ISR	0x0a	/* interrupt status, R/O */
+#define PDAUDIOCF_REG_IER	0x0c	/* interrupt enable, R/W */
+#define PDAUDIOCF_REG_AK_IFR	0x0e	/* AK interface register, R/W */
+
+/* PDAUDIOCF_REG_TCR */
+#define PDAUDIOCF_ELIMAKMBIT	(1<<0)	/* simulate AKM music data */
+#define PDAUDIOCF_TESTDATASEL	(1<<1)	/* test data selection, 0 = 0x55, 1 = pseudo-random */
+
+/* PDAUDIOCF_REG_SCR */
+#define PDAUDIOCF_AK_SBP	(1<<0)	/* serial port busy flag */
+#define PDAUDIOCF_RST		(1<<2)	/* FPGA, AKM + SRAM buffer reset */
+#define PDAUDIOCF_PDN		(1<<3)	/* power down bit */
+#define PDAUDIOCF_CLKDIV0	(1<<4)	/* choose 24.576Mhz clock divided by 1,2,3 or 4 */
+#define PDAUDIOCF_CLKDIV1	(1<<5)
+#define PDAUDIOCF_RECORD	(1<<6)	/* start capturing to SRAM */
+#define PDAUDIOCF_AK_SDD	(1<<7)	/* music data detected */
+#define PDAUDIOCF_RED_LED_OFF	(1<<8)	/* red LED off override */
+#define PDAUDIOCF_BLUE_LED_OFF	(1<<9)	/* blue LED off override */
+#define PDAUDIOCF_DATAFMT0	(1<<10)	/* data format bits: 00 = 16-bit, 01 = 18-bit */
+#define PDAUDIOCF_DATAFMT1	(1<<11)	/* 10 = 20-bit, 11 = 24-bit, all right justified */
+#define PDAUDIOCF_FPGAREV(x)	((x>>12)&0x0f) /* FPGA revision */
+
+/* PDAUDIOCF_REG_ISR */
+#define PDAUDIOCF_IRQLVL	(1<<0)	/* Buffer level IRQ */
+#define PDAUDIOCF_IRQOVR	(1<<1)	/* Overrun IRQ */
+#define PDAUDIOCF_IRQAKM	(1<<2)	/* AKM IRQ */
+
+/* PDAUDIOCF_REG_IER */
+#define PDAUDIOCF_IRQLVLEN0	(1<<0)	/* fill threshold levels; 00 = none, 01 = 1/8th of buffer */
+#define PDAUDIOCF_IRQLVLEN1	(1<<1)	/* 10 = 1/4th of buffer, 11 = 1/2th of buffer */
+#define PDAUDIOCF_IRQOVREN	(1<<2)	/* enable overrun IRQ */
+#define PDAUDIOCF_IRQAKMEN	(1<<3)	/* enable AKM IRQ */
+#define PDAUDIOCF_BLUEDUTY0	(1<<8)	/* blue LED duty cycle; 00 = 100%, 01 = 50% */
+#define PDAUDIOCF_BLUEDUTY1	(1<<9)	/* 02 = 25%, 11 = 12% */
+#define PDAUDIOCF_REDDUTY0	(1<<10)	/* red LED duty cycle; 00 = 100%, 01 = 50% */
+#define PDAUDIOCF_REDDUTY1	(1<<11)	/* 02 = 25%, 11 = 12% */
+#define PDAUDIOCF_BLUESDD	(1<<12)	/* blue LED against SDD bit */
+#define PDAUDIOCF_BLUEMODULATE	(1<<13)	/* save power when 100% duty cycle selected */
+#define PDAUDIOCF_REDMODULATE	(1<<14)	/* save power when 100% duty cycle selected */
+#define PDAUDIOCF_HALFRATE	(1<<15)	/* slow both LED blinks by half (also spdif detect rate) */
+
+/* chip status */
+#define PDAUDIOCF_STAT_IS_STALE	(1<<0)
+#define PDAUDIOCF_STAT_IS_CONFIGURED (1<<1)
+#define PDAUDIOCF_STAT_IS_SUSPENDED (1<<2)
+
+typedef struct {
+	snd_card_t *card;
+	int index;
+
+	unsigned long port;
+	int irq;
+
+	spinlock_t reg_lock;
+	unsigned short regmap[8];
+	unsigned short suspend_reg_scr;
+	struct tasklet_struct tq;
+
+	spinlock_t ak4117_lock;
+	ak4117_t *ak4117;
+
+	unsigned int chip_status;
+
+	snd_pcm_t *pcm;
+	snd_pcm_substream_t *pcm_substream;
+	unsigned int pcm_running: 1;
+	unsigned int pcm_channels;
+	unsigned int pcm_swab;
+	unsigned int pcm_little;
+	unsigned int pcm_frame;
+	unsigned int pcm_sample;
+	unsigned int pcm_xor;
+	unsigned int pcm_size;
+	unsigned int pcm_period;
+	unsigned int pcm_tdone;
+	unsigned int pcm_hwptr;
+	void *pcm_area;
+	
+	/* pcmcia stuff */
+	dev_link_t link;
+	dev_node_t node;
+} pdacf_t;
+
+static inline void pdacf_reg_write(pdacf_t *chip, unsigned char reg, unsigned short val)
+{
+	outw(chip->regmap[reg>>1] = val, chip->port + reg);
+}
+
+static inline unsigned short pdacf_reg_read(pdacf_t *chip, unsigned char reg)
+{
+	return inw(chip->port + reg);
+}
+
+unsigned char pdacf_ak4117_read(void *private_data, unsigned char reg);
+void pdacf_ak4117_write(void *private_data, unsigned char reg, unsigned char val);
+pdacf_t *snd_pdacf_create(snd_card_t *card);
+int snd_pdacf_ak4117_create(pdacf_t *pdacf);
+void snd_pdacf_powerdown(pdacf_t *chip);
+#ifdef CONFIG_PM
+void snd_pdacf_suspend(pdacf_t *chip);
+void snd_pdacf_resume(pdacf_t *chip);
+int snd_pdacf_set_power_state(snd_card_t *card, unsigned int power_state);
+#endif
+int snd_pdacf_pcm_new(pdacf_t *chip);
+void pdacf_interrupt(int irq, void *dev, struct pt_regs *regs);
+void pdacf_tasklet(unsigned long private_data);
+void pdacf_reinit(pdacf_t *chip, int resume);
+
+#endif /* __PDAUDIOCF_H */

sound/pcmcia/pdaudiocf/pdaudiocf_core.c

+/*
+ * Driver for Sound Core PDAudioCF soundcard
+ *
+ * Copyright (c) 2003 by Jaroslav Kysela <perex@suse.cz>
+ *
+ *   This program is free software; you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation; either version 2 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program; if not, write to the Free Software
+ *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
+ */
+
+#include <sound/driver.h>
+#include <linux/delay.h>
+#include <sound/core.h>
+#include <sound/info.h>
+#include "pdaudiocf.h"
+#define SNDRV_GET_ID
+#include <sound/initval.h>
+
+/*
+ *
+ */
+unsigned char pdacf_ak4117_read(void *private_data, unsigned char reg)
+{
+	pdacf_t *chip = snd_magic_cast(pdacf_t, private_data, return 0);
+	unsigned long timeout;
+	unsigned long flags;
+	unsigned char res;
+
+	spin_lock_irqsave(&chip->ak4117_lock, flags);
+	timeout = 1000;
+	while (pdacf_reg_read(chip, PDAUDIOCF_REG_SCR) & PDAUDIOCF_AK_SBP) {
+		udelay(5);
+		if (--timeout == 0) {
+			spin_unlock_irqrestore(&chip->ak4117_lock, flags);
+			snd_printk(KERN_ERR "AK4117 ready timeout (read)\n");
+			return 0;
+		}
+	}
+	pdacf_reg_write(chip, PDAUDIOCF_REG_AK_IFR, (u16)reg << 8);
+	timeout = 1000;
+	while (pdacf_reg_read(chip, PDAUDIOCF_REG_SCR) & PDAUDIOCF_AK_SBP) {
+		udelay(5);
+		if (--timeout == 0) {
+			spin_unlock_irqrestore(&chip->ak4117_lock, flags);
+			snd_printk(KERN_ERR "AK4117 read timeout (read2)\n");
+			return 0;
+		}
+	}
+	res = (unsigned char)pdacf_reg_read(chip, PDAUDIOCF_REG_AK_IFR);
+	spin_unlock_irqrestore(&chip->ak4117_lock, flags);
+	return res;
+}
+
+void pdacf_ak4117_write(void *private_data, unsigned char reg, unsigned char val)
+{
+	pdacf_t *chip = snd_magic_cast(pdacf_t, private_data, return);
+	unsigned long timeout;
+	unsigned long flags;
+
+	spin_lock_irqsave(&chip->ak4117_lock, flags);
+	timeout = 1000;
+	while (inw(chip->port + PDAUDIOCF_REG_SCR) & PDAUDIOCF_AK_SBP) {
+		udelay(5);
+		if (--timeout == 0) {
+			spin_unlock_irqrestore(&chip->ak4117_lock, flags);
+			snd_printk(KERN_ERR "AK4117 ready timeout (write)\n");
+			return;
+		}
+	}
+	outw((u16)reg << 8 | val | (1<<13), chip->port + PDAUDIOCF_REG_AK_IFR);
+	spin_unlock_irqrestore(&chip->ak4117_lock, flags);
+}
+
+#if 0
+void pdacf_dump(pdacf_t *chip)
+{
+	printk("PDAUDIOCF DUMP (0x%lx):\n", chip->port);
+	printk("WPD         : 0x%x\n", inw(chip->port + PDAUDIOCF_REG_WDP));
+	printk("RDP         : 0x%x\n", inw(chip->port + PDAUDIOCF_REG_RDP));
+	printk("TCR         : 0x%x\n", inw(chip->port + PDAUDIOCF_REG_TCR));
+	printk("SCR         : 0x%x\n", inw(chip->port + PDAUDIOCF_REG_SCR));
+	printk("ISR         : 0x%x\n", inw(chip->port + PDAUDIOCF_REG_ISR));
+	printk("IER         : 0x%x\n", inw(chip->port + PDAUDIOCF_REG_IER));
+	printk("AK_IFR      : 0x%x\n", inw(chip->port + PDAUDIOCF_REG_AK_IFR));
+}
+#endif
+
+static int pdacf_reset(pdacf_t *chip, int powerdown)
+{
+	u16 val;
+	
+	val = pdacf_reg_read(chip, PDAUDIOCF_REG_SCR);
+	val |= PDAUDIOCF_PDN;
+	val &= ~PDAUDIOCF_RECORD;		/* for sure */
+	pdacf_reg_write(chip, PDAUDIOCF_REG_SCR, val);
+	udelay(5);
+	val |= PDAUDIOCF_RST;
+	pdacf_reg_write(chip, PDAUDIOCF_REG_SCR, val);
+	udelay(200);
+	val &= ~PDAUDIOCF_RST;
+	pdacf_reg_write(chip, PDAUDIOCF_REG_SCR, val);
+	udelay(5);
+	if (!powerdown) {
+		val &= ~PDAUDIOCF_PDN;
+		pdacf_reg_write(chip, PDAUDIOCF_REG_SCR, val);
+		udelay(200);
+	}
+	return 0;
+}
+
+void pdacf_reinit(pdacf_t *chip, int resume)
+{
+	pdacf_reset(chip, 0);
+	if (resume)
+		pdacf_reg_write(chip, PDAUDIOCF_REG_SCR, chip->suspend_reg_scr);
+	snd_ak4117_reinit(chip->ak4117);
+	pdacf_reg_write(chip, PDAUDIOCF_REG_TCR, chip->regmap[PDAUDIOCF_REG_TCR>>1]);
+	pdacf_reg_write(chip, PDAUDIOCF_REG_IER, chip->regmap[PDAUDIOCF_REG_IER>>1]);
+}
+
+static void pdacf_proc_read(snd_info_entry_t * entry,
+                            snd_info_buffer_t * buffer)
+{
+	pdacf_t *chip = snd_magic_cast(pdacf_t, entry->private_data, return);
+	u16 tmp;
+
+	snd_iprintf(buffer, "PDAudioCF\n\n");
+	tmp = pdacf_reg_read(chip, PDAUDIOCF_REG_SCR);
+	snd_iprintf(buffer, "FPGA revision      : 0x%x\n", PDAUDIOCF_FPGAREV(tmp));
+	                                   
+}
+
+static void pdacf_proc_init(pdacf_t *chip)
+{
+	snd_info_entry_t *entry;
+
+	if (! snd_card_proc_new(chip->card, "pdaudiocf", &entry))
+		snd_info_set_text_ops(entry, chip, 1024, pdacf_proc_read);
+}
+
+pdacf_t *snd_pdacf_create(snd_card_t *card)
+{
+	pdacf_t *chip;
+
+	chip = snd_magic_kcalloc(pdacf_t, 0, GFP_KERNEL);
+	if (chip == NULL)
+		return NULL;
+	chip->card = card;
+	spin_lock_init(&chip->reg_lock);
+	spin_lock_init(&chip->ak4117_lock);
+	tasklet_init(&chip->tq, pdacf_tasklet, (unsigned long)chip);
+	card->private_data = chip;
+
+	pdacf_proc_init(chip);
+	return chip;
+}
+
+static void snd_pdacf_ak4117_change(ak4117_t *ak4117, unsigned char c0, unsigned char c1)
+{
+	pdacf_t *chip = ak4117->change_callback_private;
+	unsigned long flags;
+	u16 val;
+
+	if (!(c0 & AK4117_UNLCK))
+		return;
+	spin_lock_irqsave(&chip->reg_lock, flags);
+	val = chip->regmap[PDAUDIOCF_REG_SCR>>1];
+	if (ak4117->rcs0 & AK4117_UNLCK)
+		val |= PDAUDIOCF_BLUE_LED_OFF;
+	else
+		val &= ~PDAUDIOCF_BLUE_LED_OFF;
+	pdacf_reg_write(chip, PDAUDIOCF_REG_SCR, val);
+	spin_unlock_irqrestore(&chip->reg_lock, flags);
+}
+
+int snd_pdacf_ak4117_create(pdacf_t *chip)
+{
+	int err;
+	u16 val;
+	/* design note: if we unmask PLL unlock, parity, valid, audio or auto bit interrupts */
+	/* from AK4117 then INT1 pin from AK4117 will be high all time, because PCMCIA interrupts are */
+	/* egde based and FPGA does logical OR for all interrupt sources, we cannot use these */
+	/* high-rate sources */
+	static unsigned char pgm[5] = {
+		AK4117_XTL_24_576M | AK4117_EXCT,				/* AK4117_REG_PWRDN */
+		AK4117_CM_PLL_XTAL | AK4117_PKCS_128fs | AK4117_XCKS_128fs,	/* AK4117_REQ_CLOCK */
+		AK4117_EFH_1024LRCLK | AK4117_DIF_24R | AK4117_IPS,		/* AK4117_REG_IO */
+		0xff,								/* AK4117_REG_INT0_MASK */
+		AK4117_MAUTO | AK4117_MAUD | AK4117_MULK | AK4117_MPAR | AK4117_MV, /* AK4117_REG_INT1_MASK */
+	};
+
+	err = pdacf_reset(chip, 0);
+	if (err < 0)
+		return err;
+	err = snd_ak4117_create(chip->card, pdacf_ak4117_read, pdacf_ak4117_write, pgm, chip, &chip->ak4117);
+	if (err < 0)
+		return err;
+
+	val = pdacf_reg_read(chip, PDAUDIOCF_REG_TCR);
+#if 1 /* normal operation */
+	val &= ~(PDAUDIOCF_ELIMAKMBIT|PDAUDIOCF_TESTDATASEL);
+#else /* debug */
+	val |= PDAUDIOCF_ELIMAKMBIT;
+	val &= ~PDAUDIOCF_TESTDATASEL;
+#endif
+	pdacf_reg_write(chip, PDAUDIOCF_REG_TCR, val);
+	
+	/* setup the FPGA to match AK4117 setup */
+	val = pdacf_reg_read(chip, PDAUDIOCF_REG_SCR);
+	val &= ~(PDAUDIOCF_CLKDIV0 | PDAUDIOCF_CLKDIV1);		/* use 24.576Mhz clock */
+	val &= ~(PDAUDIOCF_RED_LED_OFF|PDAUDIOCF_BLUE_LED_OFF);
+	val |= PDAUDIOCF_DATAFMT0 | PDAUDIOCF_DATAFMT1;			/* 24-bit data */
+	pdacf_reg_write(chip, PDAUDIOCF_REG_SCR, val);
+
+	/* setup LEDs and IRQ */
+	val = pdacf_reg_read(chip, PDAUDIOCF_REG_IER);
+	val &= ~(PDAUDIOCF_IRQLVLEN0 | PDAUDIOCF_IRQLVLEN1);
+	val &= ~(PDAUDIOCF_BLUEDUTY0 | PDAUDIOCF_REDDUTY0 | PDAUDIOCF_REDDUTY1);
+	val |= PDAUDIOCF_BLUEDUTY1 | PDAUDIOCF_HALFRATE;
+	val |= PDAUDIOCF_IRQOVREN | PDAUDIOCF_IRQAKMEN;
+	pdacf_reg_write(chip, PDAUDIOCF_REG_IER, val);
+
+	chip->ak4117->change_callback_private = chip;
+	chip->ak4117->change_callback = snd_pdacf_ak4117_change;
+
+	/* update LED status */
+	snd_pdacf_ak4117_change(chip->ak4117, AK4117_UNLCK, 0);
+
+	return 0;
+}
+
+void snd_pdacf_powerdown(pdacf_t *chip)
+{
+	u16 val;
+
+	val = pdacf_reg_read(chip, PDAUDIOCF_REG_SCR);
+	chip->suspend_reg_scr = val;
+	val |= PDAUDIOCF_RED_LED_OFF | PDAUDIOCF_BLUE_LED_OFF;
+	pdacf_reg_write(chip, PDAUDIOCF_REG_SCR, val);
+	/* disable interrupts, but use direct write to preserve old register value in chip->regmap */
+	val = inw(chip->port + PDAUDIOCF_REG_IER);
+	val &= ~(PDAUDIOCF_IRQOVREN|PDAUDIOCF_IRQAKMEN|PDAUDIOCF_IRQLVLEN0|PDAUDIOCF_IRQLVLEN1);
+	outw(val, chip->port + PDAUDIOCF_REG_IER);
+	pdacf_reset(chip, 1);
+}
+
+#ifdef CONFIG_PM
+
+void snd_pdacf_suspend(pdacf_t *chip)
+{
+	snd_card_t *card = chip->card;
+	u16 val;
+	
+	if (card->power_state == SNDRV_CTL_POWER_D3hot)
+		return;
+	snd_pcm_suspend_all(chip->pcm);
+	/* disable interrupts, but use direct write to preserve old register value in chip->regmap */
+	val = inw(chip->port + PDAUDIOCF_REG_IER);
+	val &= ~(PDAUDIOCF_IRQOVREN|PDAUDIOCF_IRQAKMEN|PDAUDIOCF_IRQLVLEN0|PDAUDIOCF_IRQLVLEN1);
+	outw(val, chip->port + PDAUDIOCF_REG_IER);
+	chip->chip_status |= PDAUDIOCF_STAT_IS_SUSPENDED;	/* ignore interrupts from now */
+	snd_pdacf_powerdown(chip);
+	snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
+}
+
+static inline int check_signal(pdacf_t *chip)
+{
+	return (chip->ak4117->rcs0 & AK4117_UNLCK) == 0;
+}
+
+void snd_pdacf_resume(pdacf_t *chip)
+{
+	snd_card_t *card = chip->card;
+	int timeout = 40;
+
+	if (card->power_state == SNDRV_CTL_POWER_D0)
+		return;
+	pdacf_reinit(chip, 1);
+	/* wait for AK4117's PLL */
+	while (timeout-- > 0 &&
+	       (snd_ak4117_external_rate(chip->ak4117) <= 0 || !check_signal(chip)))
+		mdelay(1);
+	chip->chip_status &= ~PDAUDIOCF_STAT_IS_SUSPENDED;
+	snd_power_change_state(card, SNDRV_CTL_POWER_D0);
+}
+
+int snd_pdacf_set_power_state(snd_card_t *card, unsigned int power_state)
+{
+	pdacf_t *chip = snd_magic_cast(pdacf_t, card->power_state_private_data, return -ENXIO);
+
+	switch (power_state) {
+	case SNDRV_CTL_POWER_D0:
+	case SNDRV_CTL_POWER_D1:
+	case SNDRV_CTL_POWER_D2:
+		snd_pdacf_resume(chip);
+		break;
+	case SNDRV_CTL_POWER_D3hot:
+	case SNDRV_CTL_POWER_D3cold:
+		snd_pdacf_suspend(chip);
+		break;
+	default:
+		return -EINVAL;
+	}
+	return 0;
+}
+
+#endif

sound/pcmcia/pdaudiocf/pdaudiocf_irq.c

+/*
+ * Driver for Sound Core PDAudioCF soundcard
+ *
+ * Copyright (c) 2003 by Jaroslav Kysela <perex@suse.cz>
+ *
+ *   This program is free software; you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation; either version 2 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program; if not, write to the Free Software
+ *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
+ */
+
+#include <sound/driver.h>
+#include <sound/core.h>
+#include "pdaudiocf.h"
+#define SNDRV_GET_ID
+#include <sound/initval.h>
+
+/*
+ *
+ */
+void pdacf_interrupt(int irq, void *dev, struct pt_regs *regs)
+{
+	pdacf_t *chip = snd_magic_cast(pdacf_t, dev, return);
+	unsigned short stat;
+
+	if ((chip->chip_status & (PDAUDIOCF_STAT_IS_STALE|
+				  PDAUDIOCF_STAT_IS_CONFIGURED|
+				  PDAUDIOCF_STAT_IS_SUSPENDED)) != PDAUDIOCF_STAT_IS_CONFIGURED)
+		return;
+
+	stat = inw(chip->port + PDAUDIOCF_REG_ISR);
+	if (stat & (PDAUDIOCF_IRQLVL|PDAUDIOCF_IRQOVR)) {
+		if (stat & PDAUDIOCF_IRQOVR)	/* should never happen */
+			snd_printk(KERN_ERR "PDAUDIOCF SRAM buffer overrun detected!\n");
+		if (chip->pcm_substream)
+			tasklet_hi_schedule(&chip->tq);
+		if (!(stat & PDAUDIOCF_IRQAKM))
+			stat |= PDAUDIOCF_IRQAKM;	/* check rate */
+	}
+	if (regs != NULL)
+		snd_ak4117_check_rate_and_errors(chip->ak4117, 0);
+}
+
+static inline void pdacf_transfer_mono16(u16 *dst, u16 xor, unsigned int size, unsigned long rdp_port)
+{
+	while (size-- > 0) {
+		*dst++ = inw(rdp_port) ^ xor;
+		inw(rdp_port);
+	}
+}
+
+static inline void pdacf_transfer_mono32(u32 *dst, u32 xor, unsigned int size, unsigned long rdp_port)
+{
+	register u16 val1, val2;
+
+	while (size-- > 0) {
+		val1 = inw(rdp_port);
+		val2 = inw(rdp_port);
+		inw(rdp_port);
+		*dst++ = ((((u32)val2 & 0xff) << 24) | ((u32)val1 << 8)) ^ xor;
+	}
+}
+
+static inline void pdacf_transfer_stereo16(u16 *dst, u16 xor, unsigned int size, unsigned long rdp_port)
+{
+	while (size-- > 0) {
+		*dst++ = inw(rdp_port) ^ xor;
+		*dst++ = inw(rdp_port) ^ xor;
+	}
+}
+
+static inline void pdacf_transfer_stereo32(u32 *dst, u32 xor, unsigned int size, unsigned long rdp_port)
+{
+	register u16 val1, val2, val3;
+
+	while (size-- > 0) {
+		val1 = inw(rdp_port);
+		val2 = inw(rdp_port);
+		val3 = inw(rdp_port);
+		*dst++ = ((((u32)val2 & 0xff) << 24) | ((u32)val1 << 8)) ^ xor;
+		*dst++ = (((u32)val3 << 16) | (val2 & 0xff00)) ^ xor;
+	}
+}
+
+static inline void pdacf_transfer_mono16sw(u16 *dst, u16 xor, unsigned int size, unsigned long rdp_port)
+{
+	while (size-- > 0) {
+		*dst++ = swab16(inw(rdp_port) ^ xor);
+		inw(rdp_port);
+	}
+}
+
+static inline void pdacf_transfer_mono32sw(u32 *dst, u32 xor, unsigned int size, unsigned long rdp_port)
+{
+	register u16 val1, val2;
+
+	while (size-- > 0) {
+		val1 = inw(rdp_port);
+		val2 = inw(rdp_port);
+		inw(rdp_port);
+		*dst++ = swab32((((val2 & 0xff) << 24) | ((u32)val1 << 8)) ^ xor);
+	}
+}
+
+static inline void pdacf_transfer_stereo16sw(u16 *dst, u16 xor, unsigned int size, unsigned long rdp_port)
+{
+	while (size-- > 0) {
+		*dst++ = swab16(inw(rdp_port) ^ xor);
+		*dst++ = swab16(inw(rdp_port) ^ xor);
+	}
+}
+
+static inline void pdacf_transfer_stereo32sw(u32 *dst, u32 xor, unsigned int size, unsigned long rdp_port)
+{
+	register u16 val1, val2, val3;
+
+	while (size-- > 0) {
+		val1 = inw(rdp_port);
+		val2 = inw(rdp_port);
+		val3 = inw(rdp_port);
+		*dst++ = swab32((((val2 & 0xff) << 24) | ((u32)val1 << 8)) ^ xor);
+		*dst++ = swab32((((u32)val3 << 16) | (val2 & 0xff00)) ^ xor);
+	}
+}
+
+static inline void pdacf_transfer_mono24le(u8 *dst, u16 xor, unsigned int size, unsigned long rdp_port)
+{
+	register u16 val1, val2;
+	register u32 xval1;
+
+	while (size-- > 0) {
+		val1 = inw(rdp_port);
+		val2 = inw(rdp_port);
+		inw(rdp_port);
+		xval1 = (((val2 & 0xff) << 8) | (val1 << 16)) ^ xor;
+		*dst++ = (u8)(xval1 >> 8);
+		*dst++ = (u8)(xval1 >> 16);
+		*dst++ = (u8)(xval1 >> 24);
+	}
+}
+
+static inline void pdacf_transfer_mono24be(u8 *dst, u16 xor, unsigned int size, unsigned long rdp_port)
+{
+	register u16 val1, val2;
+	register u32 xval1;
+
+	while (size-- > 0) {
+		val1 = inw(rdp_port);
+		val2 = inw(rdp_port);
+		inw(rdp_port);
+		xval1 = (((val2 & 0xff) << 8) | (val1 << 16)) ^ xor;
+		*dst++ = (u8)(xval1 >> 24);
+		*dst++ = (u8)(xval1 >> 16);
+		*dst++ = (u8)(xval1 >> 8);
+	}
+}
+
+static inline void pdacf_transfer_stereo24le(u8 *dst, u32 xor, unsigned int size, unsigned long rdp_port)
+{
+	register u16 val1, val2, val3;
+	register u32 xval1, xval2;
+
+	while (size-- > 0) {
+		val1 = inw(rdp_port);
+		val2 = inw(rdp_port);
+		val3 = inw(rdp_port);
+		xval1 = ((((u32)val2 & 0xff) << 24) | ((u32)val1 << 8)) ^ xor;
+		xval2 = (((u32)val3 << 16) | (val2 & 0xff00)) ^ xor;
+		*dst++ = (u8)(xval1 >> 8);
+		*dst++ = (u8)(xval1 >> 16);
+		*dst++ = (u8)(xval1 >> 24);
+		*dst++ = (u8)(xval2 >> 8);
+		*dst++ = (u8)(xval2 >> 16);
+		*dst++ = (u8)(xval2 >> 24);
+	}
+}
+
+static inline void pdacf_transfer_stereo24be(u8 *dst, u32 xor, unsigned int size, unsigned long rdp_port)
+{
+	register u16 val1, val2, val3;
+	register u32 xval1, xval2;
+
+	while (size-- > 0) {
+		val1 = inw(rdp_port);
+		val2 = inw(rdp_port);
+		val3 = inw(rdp_port);
+		xval1 = ((((u32)val2 & 0xff) << 24) | ((u32)val1 << 8)) ^ xor;
+		xval2 = (((u32)val3 << 16) | (val2 & 0xff00)) ^ xor;
+		*dst++ = (u8)(xval1 >> 24);
+		*dst++ = (u8)(xval1 >> 16);
+		*dst++ = (u8)(xval1 >> 8);
+		*dst++ = (u8)(xval2 >> 24);
+		*dst++ = (u8)(xval2 >> 16);
+		*dst++ = (u8)(xval2 >> 8);
+	}
+}
+
+static void pdacf_transfer(pdacf_t *chip, unsigned int size, unsigned int off)
+{
+	unsigned long rdp_port = chip->port + PDAUDIOCF_REG_MD;
+	unsigned int xor = chip->pcm_xor;
+
+	if (chip->pcm_sample == 3) {
+		if (chip->pcm_little) {
+			if (chip->pcm_channels == 1) {
+				pdacf_transfer_mono24le((char *)chip->pcm_area + (off * 3), xor, size, rdp_port);
+			} else {
+				pdacf_transfer_stereo24le((char *)chip->pcm_area + (off * 6), xor, size, rdp_port);
+			}
+		} else {
+			if (chip->pcm_channels == 1) {
+				pdacf_transfer_mono24be((char *)chip->pcm_area + (off * 3), xor, size, rdp_port);
+			} else {
+				pdacf_transfer_stereo24be((char *)chip->pcm_area + (off * 6), xor, size, rdp_port);
+			}			
+		}
+		return;
+	}
+	if (chip->pcm_swab == 0) {
+		if (chip->pcm_channels == 1) {
+			if (chip->pcm_frame == 2) {
+				pdacf_transfer_mono16((u16 *)chip->pcm_area + off, xor, size, rdp_port);
+			} else {
+				pdacf_transfer_mono32((u32 *)chip->pcm_area + off, xor, size, rdp_port);
+			}
+		} else {
+			if (chip->pcm_frame == 2) {
+				pdacf_transfer_stereo16((u16 *)chip->pcm_area + (off * 2), xor, size, rdp_port);
+			} else {
+				pdacf_transfer_stereo32((u32 *)chip->pcm_area + (off * 2), xor, size, rdp_port);
+			}
+		}
+	} else {
+		if (chip->pcm_channels == 1) {
+			if (chip->pcm_frame == 2) {
+				pdacf_transfer_mono16sw((u16 *)chip->pcm_area + off, xor, size, rdp_port);
+			} else {
+				pdacf_transfer_mono32sw((u32 *)chip->pcm_area + off, xor, size, rdp_port);
+			}
+		} else {
+			if (chip->pcm_frame == 2) {
+				pdacf_transfer_stereo16sw((u16 *)chip->pcm_area + (off * 2), xor, size, rdp_port);
+			} else {
+				pdacf_transfer_stereo32sw((u32 *)chip->pcm_area + (off * 2), xor, size, rdp_port);
+			}
+		}
+	}
+}
+
+void pdacf_tasklet(unsigned long private_data)
+{
+	pdacf_t *chip = snd_magic_cast(pdacf_t, (void *)private_data, return);
+	int size, off, cont, rdp, wdp;
+
+	if ((chip->chip_status & (PDAUDIOCF_STAT_IS_STALE|PDAUDIOCF_STAT_IS_CONFIGURED)) != PDAUDIOCF_STAT_IS_CONFIGURED)
+		return;
+	
+	if (chip->pcm_substream == NULL || chip->pcm_substream->runtime == NULL || !snd_pcm_running(chip->pcm_substream))
+		return;
+
+	(unsigned int)rdp = inw(chip->port + PDAUDIOCF_REG_RDP);
+	(unsigned int)wdp = inw(chip->port + PDAUDIOCF_REG_WDP);
+	// printk("TASKLET: rdp = %x, wdp = %x\n", rdp, wdp);
+	size = wdp - rdp;
+	if (size < 0)
+		size += 0x10000;
+	if (size == 0)
+		size = 0x10000;
+	size /= chip->pcm_frame;
+	if (size > 64)
+		size -= 32;
+
+#if 0
+	chip->pcm_hwptr += size;
+	chip->pcm_hwptr %= chip->pcm_size;
+	chip->pcm_tdone += size;
+	if (chip->pcm_frame == 2) {
+		unsigned long rdp_port = chip->port + PDAUDIOCF_REG_MD;
+		while (size-- > 0) {
+			inw(rdp_port);
+			inw(rdp_port);
+		}
+	} else {
+		unsigned long rdp_port = chip->port + PDAUDIOCF_REG_MD;
+		while (size-- > 0) {
+			inw(rdp_port);
+			inw(rdp_port);
+			inw(rdp_port);
+		}
+	}
+#else
+	off = chip->pcm_hwptr + chip->pcm_tdone;
+	off %= chip->pcm_size;
+	chip->pcm_tdone += size;
+	while (size > 0) {
+		cont = chip->pcm_size - off;
+		if (cont > size)
+			cont = size;
+		pdacf_transfer(chip, cont, off);
+		off += cont;
+		off %= chip->pcm_size;
+		size -= cont;
+	}
+#endif
+	spin_lock(&chip->reg_lock);
+	while (chip->pcm_tdone >= chip->pcm_period) {
+		chip->pcm_hwptr += chip->pcm_period;
+		chip->pcm_hwptr %= chip->pcm_size;
+		chip->pcm_tdone -= chip->pcm_period;
+		spin_unlock(&chip->reg_lock);
+		snd_pcm_period_elapsed(chip->pcm_substream);
+		spin_lock(&chip->reg_lock);
+	}
+	spin_unlock(&chip->reg_lock);
+	// printk("TASKLET: end\n");
+}

sound/pcmcia/pdaudiocf/pdaudiocf_pcm.c

+/*
+ * Driver for Sound Core PDAudioCF soundcards
+ *
+ * PCM part
+ *
+ * Copyright (c) 2003 by Jaroslav Kysela <perex@suse.cz>
+ *
+ *   This program is free software; you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation; either version 2 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program; if not, write to the Free Software
+ *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
+ */
+
+#include <sound/driver.h>
+#include <linux/slab.h>
+#include <linux/vmalloc.h>
+#include <linux/delay.h>
+#include <sound/core.h>
+#include <sound/asoundef.h>
+#include "pdaudiocf.h"
+
+#define chip_t	pdacf_t
+
+
+/*
+ * we use a vmalloc'ed (sg-)buffer
+ */
+
+/* get the physical page pointer on the given offset */
+static struct page *snd_pcm_get_vmalloc_page(snd_pcm_substream_t *subs, unsigned long offset)
+{
+	void *pageptr = subs->runtime->dma_area + offset;
+	return vmalloc_to_page(pageptr);
+}
+
+/*
+ * hw_params callback
+ * NOTE: this may be called not only once per pcm open!
+ */
+static int snd_pcm_alloc_vmalloc_buffer(snd_pcm_substream_t *subs, size_t size)
+{
+	snd_pcm_runtime_t *runtime = subs->runtime;
+	if (runtime->dma_area) {
+		if (runtime->dma_bytes >= size)
+			return 0; /* already enough large */
+		vfree_nocheck(runtime->dma_area);
+	}
+	runtime->dma_area = vmalloc_nocheck(size);
+	if (! runtime->dma_area)
+		return -ENOMEM;
+	runtime->dma_bytes = size;
+	return 0;
+}
+
+/*
+ * hw_free callback
+ * NOTE: this may be called not only once per pcm open!
+ */
+static int snd_pcm_free_vmalloc_buffer(snd_pcm_substream_t *subs)
+{
+	snd_pcm_runtime_t *runtime = subs->runtime;
+	if (runtime->dma_area) {
+		vfree_nocheck(runtime->dma_area);
+		runtime->dma_area = NULL;
+	}
+	return 0;
+}
+
+/*
+ * clear the SRAM contents
+ */
+static int pdacf_pcm_clear_sram(pdacf_t *chip)
+{
+	int max_loop = 64 * 1024;
+
+	while (inw(chip->port + PDAUDIOCF_REG_RDP) != inw(chip->port + PDAUDIOCF_REG_WDP)) {
+		if (max_loop-- < 0)
+			return -EIO;
+		inw(chip->port + PDAUDIOCF_REG_MD);
+	}
+	return 0;
+}
+
+/*
+ * pdacf_pcm_trigger - trigger callback for capture
+ */
+static int pdacf_pcm_trigger(snd_pcm_substream_t *subs, int cmd)
+{
+	pdacf_t *chip = snd_pcm_substream_chip(subs);
+	snd_pcm_runtime_t *runtime = subs->runtime;
+	int inc, ret = 0, rate;
+	unsigned short mask, val, tmp;
+
+	if (chip->chip_status & PDAUDIOCF_STAT_IS_STALE)
+		return -EBUSY;
+
+	switch (cmd) {
+	case SNDRV_PCM_TRIGGER_START:
+		chip->pcm_hwptr = 0;
+		chip->pcm_tdone = 0;
+		/* fall thru */
+	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+	case SNDRV_PCM_TRIGGER_RESUME:
+		mask = 0;
+		val = PDAUDIOCF_RECORD;
+		inc = 1;
+		rate = snd_ak4117_check_rate_and_errors(chip->ak4117, AK4117_CHECK_NO_STAT|AK4117_CHECK_NO_RATE);
+		break;
+	case SNDRV_PCM_TRIGGER_STOP:
+	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+	case SNDRV_PCM_TRIGGER_SUSPEND:
+		mask = PDAUDIOCF_RECORD;
+		val = 0;
+		inc = -1;
+		rate = 0;
+		break;
+	default:
+		return -EINVAL;
+	}
+	spin_lock(&chip->reg_lock);
+	chip->pcm_running += inc;
+	tmp = pdacf_reg_read(chip, PDAUDIOCF_REG_SCR);
+	if (chip->pcm_running) {
+		if ((chip->ak4117->rcs0 & AK4117_UNLCK) || runtime->rate != rate) {
+			chip->pcm_running -= inc;
+			ret = -EIO;
+			goto __end;
+		}
+	}
+	tmp &= ~mask;
+	tmp |= val;
+	pdacf_reg_write(chip, PDAUDIOCF_REG_SCR, tmp);
+      __end:
+	spin_unlock(&chip->reg_lock);
+	snd_ak4117_check_rate_and_errors(chip->ak4117, AK4117_CHECK_NO_RATE);
+	return ret;
+}
+
+/*
+ * pdacf_pcm_hw_params - hw_params callback for playback and capture
+ */
+static int pdacf_pcm_hw_params(snd_pcm_substream_t *subs,
+				     snd_pcm_hw_params_t *hw_params)
+{
+	return snd_pcm_alloc_vmalloc_buffer(subs, params_buffer_bytes(hw_params));
+}
+
+/*
+ * pdacf_pcm_hw_free - hw_free callback for playback and capture
+ */
+static int pdacf_pcm_hw_free(snd_pcm_substream_t *subs)
+{
+	return snd_pcm_free_vmalloc_buffer(subs);
+}
+
+/*
+ * pdacf_pcm_prepare - prepare callback for playback and capture
+ */
+static int pdacf_pcm_prepare(snd_pcm_substream_t *subs)
+{
+	pdacf_t *chip = snd_pcm_substream_chip(subs);
+	snd_pcm_runtime_t *runtime = subs->runtime;
+	u16 val, nval, aval;
+
+	if (chip->chip_status & PDAUDIOCF_STAT_IS_STALE)
+		return -EBUSY;
+
+	chip->pcm_channels = runtime->channels;
+
+	chip->pcm_little = snd_pcm_format_little_endian(runtime->format) > 0;
+#ifdef SNDRV_LITTLE_ENDIAN
+	chip->pcm_swab = snd_pcm_format_big_endian(runtime->format) > 0;
+#else
+	chip->pcm_swab = chip->pcm_little;
+#endif
+
+	if (snd_pcm_format_unsigned(runtime->format))
+		chip->pcm_xor = 0x80008000;
+
+	if (pdacf_pcm_clear_sram(chip) < 0)
+		return -EIO;
+	
+	val = nval = pdacf_reg_read(chip, PDAUDIOCF_REG_SCR);
+	nval &= ~(PDAUDIOCF_DATAFMT0|PDAUDIOCF_DATAFMT1);
+	switch (runtime->format) {
+	case SNDRV_PCM_FORMAT_S16_LE:
+	case SNDRV_PCM_FORMAT_S16_BE:
+		break;
+	default: /* 24-bit */
+		nval |= PDAUDIOCF_DATAFMT0 | PDAUDIOCF_DATAFMT1;
+		break;
+	}
+	aval = 0;
+	chip->pcm_sample = 4;
+	switch (runtime->format) {
+	case SNDRV_PCM_FORMAT_S16_LE:
+	case SNDRV_PCM_FORMAT_S16_BE:
+		aval = AK4117_DIF_16R;
+		chip->pcm_frame = 2;
+		chip->pcm_sample = 2;
+		break;
+	case SNDRV_PCM_FORMAT_S24_3LE:
+	case SNDRV_PCM_FORMAT_S24_3BE:
+		chip->pcm_sample = 3;
+		/* fall trough */
+	default: /* 24-bit */
+		aval = AK4117_DIF_24R;
+		chip->pcm_frame = 3;
+		chip->pcm_xor &= 0xffff0000;
+		break;
+	}
+
+	if (val != nval) {
+		snd_ak4117_reg_write(chip->ak4117, AK4117_REG_IO, AK4117_DIF2|AK4117_DIF1|AK4117_DIF0, aval);
+		pdacf_reg_write(chip, PDAUDIOCF_REG_SCR, nval);
+	}
+
+	val = pdacf_reg_read(chip,  PDAUDIOCF_REG_IER);
+	val &= ~(PDAUDIOCF_IRQLVLEN1);
+	val |= PDAUDIOCF_IRQLVLEN0;
+	pdacf_reg_write(chip, PDAUDIOCF_REG_IER, val);
+
+	chip->pcm_size = runtime->buffer_size;
+	chip->pcm_period = runtime->period_size;
+	chip->pcm_area = runtime->dma_area;
+
+	return 0;
+}
+
+
+/*
+ * capture hw information
+ */
+
+static snd_pcm_hardware_t pdacf_pcm_capture_hw = {
+	.info =			(SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
+				 SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME |
+				 SNDRV_PCM_INFO_MMAP_VALID),
+	.formats =		SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE |
+				SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_S24_3BE |
+				SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S32_BE,
+	.rates =		SNDRV_PCM_RATE_32000 |
+				SNDRV_PCM_RATE_44100 |
+				SNDRV_PCM_RATE_48000 |
+				SNDRV_PCM_RATE_88200 |
+				SNDRV_PCM_RATE_96000 |
+				SNDRV_PCM_RATE_176400 |
+				SNDRV_PCM_RATE_192000,
+	.rate_min =		32000,
+	.rate_max =		192000,
+	.channels_min =		1,
+	.channels_max =		2,
+	.buffer_bytes_max =	(512*1024),
+	.period_bytes_min =	8*1024,
+	.period_bytes_max =	(64*1024),
+	.periods_min =		2,
+	.periods_max =		128,
+	.fifo_size =		0,
+};
+
+
+/*
+ * pdacf_pcm_capture_open - open callback for capture
+ */
+static int pdacf_pcm_capture_open(snd_pcm_substream_t *subs)
+{
+	snd_pcm_runtime_t *runtime = subs->runtime;
+	pdacf_t *chip = snd_pcm_substream_chip(subs);
+
+	if (chip->chip_status & PDAUDIOCF_STAT_IS_STALE)
+		return -EBUSY;
+
+	runtime->hw = pdacf_pcm_capture_hw;
+	runtime->private_data = chip;
+	chip->pcm_substream = subs;
+
+	return 0;
+}
+
+/*
+ * pdacf_pcm_capture_close - close callback for capture
+ */
+static int pdacf_pcm_capture_close(snd_pcm_substream_t *subs)
+{
+	pdacf_t *chip = snd_pcm_substream_chip(subs);
+
+	if (!chip)
+		return -EINVAL;
+	pdacf_reinit(chip, 0);
+	chip->pcm_substream = NULL;
+	return 0;
+}
+
+
+/*
+ * pdacf_pcm_capture_pointer - pointer callback for capture
+ */
+static snd_pcm_uframes_t pdacf_pcm_capture_pointer(snd_pcm_substream_t *subs)
+{
+	pdacf_t *chip = snd_pcm_substream_chip(subs);
+	return chip->pcm_hwptr;
+}
+
+/*
+ * operators for PCM capture
+ */
+static snd_pcm_ops_t pdacf_pcm_capture_ops = {
+	.open =		pdacf_pcm_capture_open,
+	.close =	pdacf_pcm_capture_close,
+	.ioctl =	snd_pcm_lib_ioctl,
+	.hw_params =	pdacf_pcm_hw_params,
+	.hw_free =	pdacf_pcm_hw_free,
+	.prepare =	pdacf_pcm_prepare,
+	.trigger =	pdacf_pcm_trigger,
+	.pointer =	pdacf_pcm_capture_pointer,
+	.page =		snd_pcm_get_vmalloc_page,
+};
+
+
+/*
+ * free callback for pcm
+ */
+static void snd_pdacf_pcm_free(snd_pcm_t *pcm)
+{
+	pdacf_t *chip = snd_magic_cast(pdacf_t, pcm->private_data, return);
+	chip->pcm = NULL;
+}
+
+/*
+ * snd_pdacf_pcm_new - create and initialize a pcm
+ */
+int snd_pdacf_pcm_new(pdacf_t *chip)
+{
+	snd_pcm_t *pcm;
+	int err;
+
+	err = snd_pcm_new(chip->card, "PDAudioCF", 0, 0, 1, &pcm);
+	if (err < 0)
+		return err;
+		
+	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &pdacf_pcm_capture_ops);
+
+	pcm->private_data = chip;
+	pcm->private_free = snd_pdacf_pcm_free;
+	pcm->info_flags = 0;
+	strcpy(pcm->name, chip->card->shortname);
+	chip->pcm = pcm;
+	
+	err = snd_ak4117_build(chip->ak4117, pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream);
+	if (err < 0)
+		return err;
+
+	return 0;
+}